Beaulieu, Minnesota has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from -1.1 °C (low) to 10 °C (high). Annual precipitation averages 652 Millimeters. Beaulieu is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -18.8 °C | -8.7 °C | 22.61 mm |
| February | -17.3 °C | -6 °C | 19.56 mm |
| March | -9.2 °C | 1.4 °C | 25.4 mm |
| April | -1.2 °C | 10.6 °C | 36.32 mm |
| May | 5.8 °C | 18.5 °C | 79.25 mm |
| June | 12.1 °C | 23.6 °C | 109.98 mm |
| July | 14.2 °C | 26 °C | 92.96 mm |
| August | 12.9 °C | 25.4 °C | 75.69 mm |
| September | 8.1 °C | 20.7 °C | 73.15 mm |
| October | 1.3 °C | 11.9 °C | 62.48 mm |
| November | -6.8 °C | 2.2 °C | 29.46 mm |
| December | -14.4 °C | -5.3 °C | 25.15 mm |
| Annual | -1.1 °C | 10 °C | 652.01 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -34.4°C to -31.7°C |
| Plant Hardiness Zone - 2012 | Zone 3b : -37.2°C to -34.4°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |